<template>
  <view>
    <my-search @click="gotoSearch"></my-search>
    <view class="scroll-view-container">
      <scroll-view scroll-y="true" class="left-scroll-view" :style="{height:wh+'px'}">
        <block v-for="(item,i) in cateList" :key="i">
          <view :class="['left-scroll-view-item', i===active?'active':'']" @click="activeChanged(i)">
            {{item.cat_name}}
          </view>
        </block>
        
      </scroll-view>
      <scroll-view class="right-scroll-view" :style="{height:wh+'px'}" scroll-y="true" :scroll-top="scrollTop">
        <block class="cate-lv2" v-for="(item2,i2) in cateLevel2" :key="i2">
          <view class="cate-lv2-title">
            / {{item2.cat_name}} /
          </view>
          <view class="cate-lv3-list">
            <view class="cate-lv3-item" v-for="(item3,i3) in item2.children" :key="i3" @click="gotoGoodsList(item3)">
              <image :src="item3.cat_icon.replace('dev','web')"></image>
              <text>{{item3.cat_name}}</text>
            </view>
         
            
          </view>
        </block>
      </scroll-view>
    </view>
  </view>
</template>
  <script>
    import badgeMix from '@/mixins/tabbar-badge.js'
    
    export default {
      mixins:[badgeMix],
      data() {
        return {
          wh:0,
          cateList:[],
          active:0,
          cateLevel2:[],
          scrollTop:0
        }
      },
      onLoad(){
        const sysInfo=uni.getSystemInfoSync()
       this.wh=sysInfo.windowHeight-50
       this.getCateList()
      }
      ,
      methods: {
        async getCateList(){
          const{
            data:res}=await uni.$http.get('/api/public/v1/categories')
          if(res.meta.status!==200) return uni.$showMsg()
          this.cateList=res.message
          this.cateLevel2=res.message[0].children
        },
        activeChanged(i){
          this.active=i
          this.cateLevel2=this.cateList[i].children
          this.scrollTop=this.scrollTop===0?0.1:0
        },
        gotoGoodsList(item){
          uni.navigateTo({
            url:'/subpkg/goods_list/goods_list?cid='+item.cat_id
          })
        },
        gotoSearch(){
          uni.navigateTo({
            url:"/subpkg/search/search"
          })
        },
      }
    }
  </script>
 
  <style lang="scss">
    .scroll-view-container {
      display: flex;

      .left-scroll-view {
        width: 120px;
        .left-scroll-view-item{
          background-color: #f7f7f7;
          font-size:12px;
          text-align: center;
          line-height: 60px;
          
            &.active{
              background-color:#fff;
              position: relative;
            
              &::before{
                content:' ';
                display: block;
                height: 30px;
                width: 3px;
                background-color: #C00000;
                position: absolute;
                top:50%;
                left:0;
                transform: translateY(-50%);
              
              
            }
            
          }
        }
      }
    }
    .cate-lv2-title{
      font-size: 12px;
      text-align: center;
      font-weight: bold;
      padding:15px 0
    
    }
    .cate-lv3-list{
      display: flex;
      flex-wrap: wrap;
      
      .cate-lv3-item{
        width: 33.33%;
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        
        margin-bottom: 10px;
        image{
          width: 60px;
          height: 60px;
          
        }
        text{
          font-size: 12px;
        }
      }
      
    }
  </style>
